#include <windows.h>
#define ID_TIMER    1


LRESULT CALLBACK WndProc   (HWND, UINT, WPARAM, LPARAM) ;
VOID    CALLBACK t (HWND, UINT, UINT,   DWORD ) ;

void open();

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
     {
	 OPENFILENAME ofn;

     static char szAppName[] = "Beeper2" ;
     HWND        hwnd ;
     MSG         msg ;
     WNDCLASSEX  wndclass ;
	 wndclass.cbSize        = sizeof (wndclass) ;
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
	 wndclass.hIconSm       = LoadIcon (NULL, IDI_APPLICATION) ;

     RegisterClassEx (&wndclass) ;

     hwnd = CreateWindow (szAppName, "Beeper2 Timer Demo",
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          NULL, NULL, hInstance, NULL) ;
     //
     // !!!
	 //
	 SetTimer (hwnd, ID_TIMER, 1000, (TIMERPROC) t);

     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
	 
	 
	
	
     while (GetMessage (&msg, NULL, 0, 0))
          {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
          }
     return msg.wParam ;
     }

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
     {
     switch (iMsg)
          {
	 case WM_LBUTTONDOWN:
		 open();
		 return 0;
          case WM_DESTROY :
               KillTimer (hwnd, ID_TIMER) ;
               PostQuitMessage (0) ;
               return 0 ;
          }
     return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
     }

VOID CALLBACK t (HWND hwnd, UINT iMsg, UINT iTimerID, DWORD dwTime)
     {
     static BOOL fFlipFlop = FALSE ;
     HBRUSH      hBrush ;
     HDC         hdc ;
     RECT        rc ;

     fFlipFlop = !fFlipFlop ;

     GetClientRect (hwnd, &rc) ;

     hdc = GetDC (hwnd) ;
     hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ;

     FillRect (hdc, &rc, hBrush) ;
     ReleaseDC (hwnd, hdc) ;
     DeleteObject (hBrush) ;
     }


void open()
{
	OPENFILENAME ofn;       // common dialog box structure
	char szFile[260];       // buffer for file name
	HWND hwnd = NULL;              // owner window
	HANDLE hf;              // file handle

	// Initialize OPENFILENAME
	ZeroMemory(&ofn, sizeof(ofn));
	ofn.lStructSize = sizeof(ofn);
	ofn.hwndOwner = hwnd;
	ofn.lpstrFile = szFile;
	//
	// Set lpstrFile[0] to '\0' so that GetOpenFileName does not 
	// use the contents of szFile to initialize itself.
	//
	ofn.lpstrFile[0] = '\0';
	ofn.nMaxFile = sizeof(szFile);
	ofn.lpstrFilter = "All\0*.*\0Text\0*.TXT\0";
	ofn.nFilterIndex = 1;
	ofn.lpstrFileTitle = NULL;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = NULL;
	ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

	// Display the Open dialog box. 

	if (GetOpenFileName(&ofn)==TRUE) 
		hf = CreateFile(ofn.lpstrFile, GENERIC_READ,
			0, (LPSECURITY_ATTRIBUTES) NULL,
			OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
			(HANDLE) NULL);

}
